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2.0 Previous Work Soil Borings <br /> 2.1 General <br /> On May 12, 1993 NG and CFM co-financed a soil"boring into the tank removal <br /> location. The intent of the boring was to determine13if further work was warranted at the <br /> site. Linda Turkatte, Public Health Services, San Joaquin County, was present during <br /> the sampling. <br /> 2.2 Location and.Depth <br /> The May 12, 1993 soil boring was made with a hollow stem auger and continuous core <br /> drilling. Terminal depth was 27 feet. Samples were collected at 17, 19, and 27 feet. <br /> 2.3 Sample Handlin <br /> Samples were collected with brass tubes, sealed, and logged on a chain of custody. A <br /> soil boring log was submitted by Tom Vogle on Julyj,l, 1993. <br /> f .� <br /> 2.4 Soil Analytical Results <br /> 2.4.1 Methods of analysis used: <br /> Gasoline compounds -- modified Method 8015 <br /> BTEX compounds -- Method 8020 <br /> Total Lead -- Method EPA DOHS <br /> 2.4.2 Results: <br /> Table 1 "Soil Analysis Results" <br /> Sample# Depth Benzene, Toluene, Ethyl Total TPH Total <br /> ppb ppb Benzene, Xylene, Gasoline, Lead, ppm <br /> b ., b ppm <br /> B-1 16.5-17 60 1,7fl0 7,600 6;5,000 5,400 ND<0.3 <br /> B-1 18.5-19 830 2,000 240,000 11,460,000 44,000 10.0 <br /> B-1 26.5-27 ND 3 4 18 2 ND<0.3 <br /> i <br /> Page 2 <br /> l <br />